Metal-mold



(No Model.) I 4 Sheets-Sheet 1. J. K. GRIFFITH & J. SLATTERY.

METAL MOLD.

Patented Aug. 10,1897.

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J. K. GRIFFITH & J. SLATTERY.

METAL MOLD.

No. 587,728. Patented Aug. 10,1897.

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(No l 4 Sheets-Sheet 3. J. K. GRIFFITH & J. SLATTERY METAL MOLD.

(N0 Medial. 4 Sheets-Sheet 4. J. K. GRIFFITH & J. SLATTERY.

METAL MOLD.

No 587,728. Patented Aug. 10,1897.

j /////////lV///////////////////;//////////////////////////////////////////////////////l x I jig-g mWITNESSES INVENTORS UNITED STATES PATENT OFFICE.

J AOOB K. GRIFFITH, OF LATROBE, AND J OI-IN SLATTERY, OF PHILADELPHIA,PENNSYLVANIA.

MOLD.

SPECIFICATION forming part of Letters Patent No. 587,728, dated August10, 1897'.

A plication filed June 26, 1896. Serial No. 554,089. (No model.)

To all whom, it may concern:

Be it known that we, J AOOB K. GRIFFITH, of Latrobe, in the county ofWestmoreland, and JOHN SLATTERY, of Philadelphia, in the county ofPhiladelphia, State of Pennsyl- Vania, have invented a new and usefulImprovementin Metal-Molds, of which the follow.- ing is afull,clear, andexact description, reference being had to the accompanying drawings,forming part of this specification, in which Figure 1 is a top plan viewof a mold constructed in accordance with our invention; and Fig. 2 is aside elevation of the same, partly broken away. Fig. 3 is a sideelevation, partly broken away, showing another form of our invention;and Fig. 4: is a top plan view of the same with a portion broken away.Fig. 5 is a side elevation, partly broken away, of a third form of ourinvention. Fig. 6 is a vertical section on the line VI VI of Fig. 5.Figs. 7 and 8 are end views of oneof the molds employed, showing theblock of refractory material over which the metal flows into the mold.Fig. 9 is a longitudinal section of a fourth form of our invention, andFig. 10 is a cross-section on the line X X of Fig. 9. V

Our invention relates to the casting of a series of ingots orotherarticles in metal-molds, and is designed to provide an improvedarrangement of the flask and the metal-molds contained therein, wherebyeach article or ingot is fed uniformly and continuously during thecooling of the metal therein, and the molds are easily nested togetherfor casting and separated after casting.

In Figs. 1 and 2 of the drawings, wherein we illustrate a simple form ofour invention, a flask is employed in the form of a Maltese cross, thisflask being preferably built up in sections, as shown, the lowersection2 having integral therewith the base-plate 3, while upon theupper section t rests the top closingplate 5. Each arm of the flask isfilled with a vertical series of molds which may be superimposed uponeach other, and are formed by removable mold-sections 6. The lowermostof these sections is provided with a flat bottom resting upon thebase-plate, while in its upper portion is provided the open matrixportion, which is of the form of the article to be produced, in thiscase a brake-shoe. The upper face of the matrix-cavity is formed by thelower convex face of the next mold-section above, this mold-sectionhaving in its upper face a matrix-cavity, which is closed by the lowerconvex face of a similar section above it, these similar sections beingsuperimposed upon each other until the flask is filled, thematrix-cavities of the uppermost series being closed by the top plate ofthe mold, which is suitably formed on its under face to give therequired shape to the cavity. The center of the flask is occupied by avertical runner or gate, which is formed of separable interfittingsections 7, having registering vertical holes forming the main gate,from which lead the branch gates 8, communicating with the sprue 0 ofeach mold, this sprue being formed by a hollow block of refractorymaterial set in a receiving-cavity in the inner end of eachmold-section.

The operation is apparent, the molds and centralrunnerbeing built upwithin the flask, whose sections are placed one upon the other until thedesired height is obtained, when, the top closing-plate being applied,the metal is poured into the central gate and thence passes into eachmatrix-cavity in the several arms.

In Figs. 3 and 4 we show another form of our invention arranged for thecasting of ingots. In this form the side arms of the flask are extendedlaterally and several horizontal series of molds are nested therein. Theupper faces of the arms of the base-plate are inclined upwardly to thecentral portion of the flask, so that the molds 6 lie in inclinedpositions, each resting on top, of the one beneath it and eachcontaining an entire matrix-cavity for the ingot, this cavity preferablytapering from the gate end toward the outer end, so as to allow easydrawing of the mold. The main central runner is formed with separablesections 7, these sections extending along the inner face of the armsand formed with side apertures or gates 8', which lead into eachvertical series of molds. The upperflask-section is provided with anupwardly-inclined rim to inclose the upper molds of each series. In

too

this form we show a bottom runner 10, communicating with the centralgate and arranged for bottom pouring, a sink-head 11 being provided atthe upper end of the central gate in order to feed molten metal to theupper molds during their cooling.

In Figs. 5 and 6 we show the inclined ingotmolds 6 arranged in adifferent manner, the horizontal series being stacked one above theother on each side of a central gate, this gate being built up ofseparable sections 7 which form longitudinal gates 12, parallel witheach other and communicating alternately at the ends and at the center.by vertical openings or gates 13. Each horizontal gate is provided withthe sprues or gates 8", leading into the inclined molds, and to thecenter of the lowermost gate leads the bottom runner 10, through whichthe molten metal is fed. A sink-head 11 is provided,and topreventsticking of the ingot to the under side of the mouth portion ofthe mold, over which portion .the metal flows and would tend to melt andweld it to the ingot, we recess this under portion, as in Fig. 7, andfill it in with a block of refractory material 14. The molds may, ifdesired,

be arranged so as to rest on one edge instead of flat upon one side, inwhich case we place the refractory material 14 .in the corner, as shownin Fig. 8.

In the form of Figs. J and 10 the flask is provided with a base 3',having its face arranged in two series of steps 15, each step having acentral flat portion and thence inclined downwardly in each direction,asshown in Fig. 10. The molds 6' rest upon the steps and are held in placeby cover-plates 16, the runner-bricks 7 resting upon the central flatportions of the steps and communicating with each other, as shown.Sink-heads 1-1 are provided, one for each series of molds, and to thecentral lowermostportion of the gate leads the bottom runner 10.

We prefer to use the bottom-pour arrangement wherever the verticalseries of metalmolds is employed, although the top pour of Figs. 1 and 2may be used, if desired.

In casting with the bottom runner metal rising in the central gatepasses into the lower molds and fills these first, it then rising andfilling the upper ones successively. The advantage of this is that astream of hot molten metal flows past the entrance of each filled moldwhile its ingot is cooling, thus feeding each ingot as it shrinks,preventing piping therein.

By placing the molds in an inclined position, as shown, the metal flowscontinuously down the side and there is no danger of shells or scabsforming on the sides of theingot, as is frequently the case from toppouring when the molds are arranged vertically. Moreover, there can beno splashing of the metal on the side of the ingot and the mold isthoroughly vented, the air being forced out of the top portion of themold which is last filled. The inclination also causes one series ofmolds to fill of which extend vertically, but also gates whose generaldirection is upward-such as, for instance, in Figs. 5 and 9, whereinportions of this gate are substantiallyhorizontal,

. while the general direction of flow is upward.-

The advantages of our invention will be obvious to those skilled in theart, since a large number of metal-molds maybe nested together within asingle flask and all filled at the same operation. No skilled labor isnecessary in assembling the parts, and piping is effectually prevented.

Many changes may be made in the form and arrangement of the partswithout departure from our invention, since WVhat we claim is A 1. Thecombination with a flask, of a series of separate metal-molds fittingtherein, said molds being superposed one above the other, and a separatevertical runner of refractory materiahhaving branch gates leading intothe matrix-cavities of the metal-molds; substantially as described.

2. The combination with a flask having arms radiating from a commoncenter, of separate metal-molds superposed upon each-other in each armof the flask, and a central vertical runner of refractory material,having branch gates leading to the mold-cavities; substantially asdescribed.

3. The combination with a flaskcom-posed of severalhorizontally-dividedsect-ions, of a series of separate metal-moldsfitting therein, said molds being superposed one above the other, and aseparate vertical runner of refractory material having branch gatesleading into the matrix-cavities of the metal-molds; substantially asdescribed.

at. The combination with a flask, of a series of separate metal-moldsfitting therein, said molds being superposed one above the other, aseparate vertical runner of refractory material, having branch gatesleading into the matrix-cavities of the metal-molds,and a bottom runnerleading to the verticalrunner; substantially as described.

5. The combination with a flask, of a series of separate metal-moldsarranged in an inclined position therein, and a gate of refractorymaterial having branches leading into the upper ends of themold-cavities substantially as described.

6. The combination with a flask,of a series of separate metal-moldsarranged in an inclined position therein, and a bottom-pour runnerarranged to feed the metal into the upper ends of the mold-cavities;substantially as described.

7. The combination with a flask, of aseries of molds arranged in aninclined position therein, and a central gate having branches leading tothe molds, each mold having the under side of its upper end providedwith a layer of refractory material, substantially as described.

S. The combination with a separate bottom support having an inclinedupper face, of a series of separate metal-molds placed thereon in anupwardly-inclined position and superimposed upon each other, and abottom-pour gate of refractory material passing through said support andhaving branches leading to the upper end of each mold-cavity.

9. In casting apparatus, the combination with an upwardly-extending maingate or runner, of upwardly-inclined molds having their upper endsconnected to the main runner by branch gates, said molds being arrangedat successively higher levels, and a bottom runner leading to the lowerportion of the main runner, whereby the metal flows downwardly over theside or sides of the 20 lowest mold and then upwardly through the maingate, past the branch gate of such mold to a mold at a higher level, atthe same time feeding the shrinkage in the first-filled mold.

In testimony whereof we have hereunto set 25 our hands.

JACOB K. GRIFFITH. J OIIN SLATTERY. \Vitnesses as to J. K. Griffith:

CHAS. W. SAXMAN, H. M. HUFFMAN. lVitnesses as to John Slattery:

ROBERT W. HUTCHISON, EDWARD SHIELDS.

